The Rocky Horror Picture Show is a 1975 British musical comedy horror film and an adaptation of The Rocky Horror Show, a musical stage play, book, music, and lyrics by Richard O'Brien. Directed by Jim Sharman from a screenplay by Sharman and O'Brien, the production is a humorous tribute to the science fiction and horror B movies of the late 1940s through early 1970s. It introduces Tim Curry and features Susan Sarandon and Barry Bostwick along with cast members from the original Kings Road production presented at the Royal Court Theatre, London, in 1973.

Still in limited release nearly four decades after its premiere, it has the longest-running theatrical release in film history. It gained notoriety as a midnight movie in 1977 when audiences began participating with the film in theatres. The film has a large international cult following and is one of the most well-known and financially successful midnight movies of all time. In 2005, the film was selected for preservation in the United States National Film Registry by the Library of Congress as being "culturally, historically, or aesthetically significant".